CONSISTENCY OF STATISTICAL MODELS DESCRIBED BY FAMILIES
OF REVERSED SUBMARTINGALES
Abstract: A large number of statistical models is described by a family of reversed
submartingales converging to degenerated limits. The problem under consideration is to
estimate the maximum points of the limit function. For this, various maximum functions are
used and consequently different concepts of consistency are introduced. In this paper we
introduce and investigate a general reversed submartingale framework for these models. Our
approach relies upon the i.i.d. case [6]. We show that the best known sufficient conditions for
consistency in this case remain valid for conditionally
-regular families of reversed
submartingales introduced in [13], which are known to include all
-processes. Moreover,
by using results on uniform convergence of families of reversed submartingales [15], we
deduce new conditions for consistency. These conditions are expressed by means of
Hardy’s regular convergence [4], and are of a total boundedness in the mean type.
In this way the problem of consistency is naturally connected with the infinitely
dimensional (uniform) reversed submartingale convergence theorem. Applications to a
stochastic maximization of families of random processes over time sets are also given.
2000 AMS Mathematics Subject Classification: Primary: -; Secondary: -;
Key words and phrases: -